Water filter reservoir



FIG. 1 is a top perspective view of a water filter reservoir embodying the new design;

FIG. 2 is a front elevational view of the reservoir of FIG. 1;

FIG. 3 is a back elevational view of the reservoir of FIG. 1;

FIG. 4 is a side elevational view of the reservoir of FIG. 1;

FIG 5. is a side elevational view of the reservoir of FIG. 1, opposite to that of FIG. 4 (FIGS. 4 and 5 being mirror images);

FIG. 6 is a top plan view of the reservoir of FIG. 1; and,

FIG. 7 is a bottom plan view of the reservoir of FIG. 1. 

The ornamental design for a water filter reservoir, as shown and described. 